courageous. americans are counting on you. >> giffords' husband, mark kelly also spoke along with the nra's wayne lapierre. tonight anderson cooper is looking at both sides of the debate in "guns under fire" this is an "ac360" town hall special tonight at 8:00 on cnn, it's going to be really interesting. as they debated gun control in washington another shooting was unfolding. arizona police are searching for the 70-year-old man they say is responsible for a deadly shooting in phoenix. the suspect, arthur douglas harmon was attending a meeting at a law office when he allegedly opened fire. 48 man was killed, two others wounded in the attack. harmon took off in a 2013 kia optima. police say he opened fire on a witness who tried to follow him. >>> hackers invading the "new york times" have finally been blocked at least for now. this is an amazing story. these hackers out of china have been attacking "the times" over the past four months, infiltrating their computer systems and stealing passwords. the papers say the timing of the attack related or not happens to coincide with their i